Fitted from the factory, the BETA REED SENSOR (OEM 031.40.166.00.00) is Beta’s original Wiring Harness component for the ALP 200 4T, RR 125 2T, RR 125 2T RACING, RR 125 2T X-PRO, RR 125 4T LC ENDURO, RR 125 4T R ENDURO and 28 more models (2019–2027). It keeps your Beta performing exactly as the factory intended. Replace it as part of norma